Disk harrow



QN new 2 SHEETS- SHEET 1 0% QJN C I/ .INN NW /ll NM. .RNW N P. R. soNNEMAN DsK HARRow I Q? m x I I o g o Q jf/067%? fazzz 5072726772627? Feb. 5, 1952 Filed Dec. 18, 1944 Feb. 5, 1952 P, R, sOnuE-lv'lsml 2,584,238

DISK HARROW Filed DSC. 18, 1944 V 2- SHEETS-SHEET 2 Patented Feb. 5, 1952 UNITED vSTATE Disk HARROW Paul R. Sonneman, Chicago, Ill., assignor to InternationalHarvester Company, a corporation of New Jersey Application December 18, 1944, Serial No. 568,573

' 3 Claims.

This invention relates to agricultural implements andparticularly to disk harrows and the like. More specifically, the inventionconcerns tandem disk harrows adapted to be drawn by a tractor. l

An object of the invention is to provide improved connections between the front and rear sections of a 4tandem disk harrow. Y

In tandem disk harrows adapted to be vdrawn by tractors` and the like, the rear section is so positioned 'gas to trail', when straightened for transport purposes or the like, at a distance of several feet behind the rst section. One of the f problems incident to the use of such implements has been that, in backing up, the side draft on the disks of the trailing rear section caused it to move sidewise and render steering thereof very diflicult or impossible. Since backing up is done fairly frequently to dislodge trash from the disks and the like,l the problem has become one of considerable importance.

Therefore, another object of the invention is to provide-'means for controlling the rear section of a tandem disk harrow when backing up.

A further object is to provide connecting means between front and rear sections of a tandem diskfhfarrow, whereby the rear section, during backingup, is telescoped with respect to the front section to form a compact, easily steerable unit. Y

Still another object is to provide as the sole connectingmeans between front and rear sections, a centrally disposed connecting Amember servinga's a frame and draft member for the rear section, and providing a telescoping connection whereby the front and rear sections may be brought closer together when backing up.

Other objects and advantages will become clear from the following detailed description when read in conjunction with the accompanying drawings, wherein:

Figure l is a plan view of a tandem disk harrow embodying the features of the present invention and showing the disk gangs-in operating position; "Figure 2 is a plan view similar to Figure 1, showing the disk gangs in transport position and with the front section telescoped rearwardly in juxtaposition with the rear section to facilitate -backing up;

Figure 3 is a side view ofthe structure shown in Figure 2; and y Figure 4 is a detail of a portion of the center bar of the harrow and showing its 'relationship with the rear section.

In the drawings, it will be noted that the tan dem disk harrow of the present invention includes a frame I0, a pair of front and rear sec-v tions II and I2, anda draft structure I3.

Front section- I I comprises a pair of disk gangs I4 and I5 mounted upon frames I6 and `lire-I spectively. Frames I6 'and I1 are pivotally connected at their inner ends to a transverse plate I8 for pivotal movement in a generally horizontal plane whereby gangs I4 and I5 are permitted to occupy positions between that shown in Figure 2, wherein the gangs are in axial alinement and the harrow is in position for transport, and Figure 1 wherein the gangs are at an angle with respect to each other. y

Plate I8 is securedto a centrally disposed frame member or center bar generally indicated at I9 and including a forward portion 20, and a rearward portion 2I pivoted to the forward portion for both lateral "and vertical movement. The forward part 20 of central frame member I9 has secured thereto'vlaterallyspaced angle'bars 22 forming a channel therebetween and havingsecured thereto laterally spaced lugs 23 upon which are pivotally mounted the front ends of a pair of laterally spaced straps 24 and 25. The rearwardly extendingends of straps 24 and 25 are pivotally attached to the inner ends of gangs I4 and I5, respectively-for a purpose which will hereinafter'become clear.

The channel between angle bars 22 providesva groove in which is slidable a longitudinally extending member 26 having securedto the rear end thereof verticall spaced plates 21 wider than the member 261 nd` adaptedfto ride upon the vertically extendingange portion of angle bar 22. Member 26 is likewise provided onits upper surface with a toothed rack 28 havingaa function to be hereinafter set forth.l At'its'forward end member 26 is provided with a vertif cally extending plate 29 which is pivotally connected to a clevis 30 adapted to beV attached to the draw-bar of a tractor or the like. To the lower end of member 29 are pivotally attached the front ends of a'pair of rearwardly diverging straps 3-I and 32. the rear ends of which are pivotally connected to extensions 33 and 34 mounted upon the forward portions of frames I6 and I'I, respectively, adjacent the outer ends thereof.

Secured to the forward ends of angle bars 22 are laterally spaced upstanding ears 35 having mounted therebetween a pin 36 upon which is pivoted a bent arm 31, having a pin 38 secured to the bight portion thereof, and having a rope 39 attached to the free end thereof. zArm 311s rockable upon its pivot 36 by manipulation of rope 39, which extends forwardly to a position accessible tothe operator of the vehicle by which the harrow of the present invention is drawn. Rocky ing movement of the arm 31 to the position shown in'Figure 3 places the pin 38 in one of the notches in the rack 28, thus preventing sliding movement-of niember26 relativeit'o the bars 22. Upon withdrawal of pin38 from the rack 28, the member 26, of course, h-as free sliding movement in thel channel formed by the bars 22, the plates 21 serving as a stop to abut against the ears 35 in one direction and a bend in the memberv 20' in the other direction to limit the longitudinal movement thereof. In theposition of ther'mem-f |4 and |5'at an angle withrespectto each other and with respect to the harrowframe. This forward movement of the member 26 occurs. as a.

result of the draft force-exerted` thereupon .byy

the vehicle to which the implement is attached. Upon `backing up the vehicle, ofcourse, themember26 willT be retracted and the gangs |4 and vl5 will return to theposition shown in Figure V2.

The harrow of the presentinv'ention is a tandem `disk` harrow and the rear section |2 is shown Y as comprising disk gangs 46 and. 4| mounted upon frames 42 and- 43-sirn-ilar to theframes I6 andv I1. Frames42 andv 43 .are pivotally connected at their'inner ends; to a plate 44Y for longitudinal pivotal movement in a generallyhorizontal plane." Plate=44 is likewise provided with longitudinally spaced pairs of bolts 45 providing therebetween a guideway vfor the rear center-bar section 2| to serve with the, bar 2| as a telescopic connection and permit longitudinal sliding movement of the plate 44 relative to the bar 2 I.

, Upon the rear portionsof frames I6 and |1 are mounted racks 46 and 41, respectively, adapted to hold weightswhen-extral pressure is desired inorder to force the disksdeeper into the ground or to penetrate hard soil or the like. Adjacent' the outer ends of the racks 46 and 41 arerearwardlyand vdownwardly extending bumpers 48 serving a function which will hereinafter be de;-A scribed; The inner ends of racks 46 and'41 are provided with extensions 49 to which are pivotally attached the forwardendsv of rearwardly and outwardly extending V links 56 and 5|. The rear ends of links 50 and 5| are Apivotally secured respectively to the frames 42 and 43 of the rear section l2. Thus plate 44 is 'slidable upon the center bar 2|, and links 50 andV 5|,. pivotally connected to the front and rear sections and I2, and functioning as draft connections which collapsev to permit vthe front-section 'and the center bar 2| to be moved relatively .to the rear section. The collapse of links 50 v and 5| causes the front section to telescope to a location in juxtaposition with the rear section, as indicated in Figure 2.

AIn the position shown in Figure 2,. the rear gangs 4 0 and 4| are in alinement with and parallel to the front 'gangs I4 and |5, and the front and rearsections have telesco'ped until. the frames 42 and, 43. are in contact with the `bumpers 48 on the front section. This occurs when-the implement-.is backed up. pointed out before, this 4 frequently occurs in the field during operation of the implement when it is necessary, for example, to dislodge accumulations of trash in the disks. The proximity of the rear section l2 to the front section and the contact thereof with the bumpers 48 permits the rear section to be guided with the front section .and avoids the dii- 'culties' previouslyvv encountered with implements of this .typawhen sideV draft upon the rear section tended to interfere seriously with the guiding of the implement. Forward draft upon the implement causes the gangs to again assume positions such as that shown in Figure 1 for operatingpurposes; Forward movement of member 26 causes-the outer ends of gangs |4 and |5 to swing forwardly'. Corresponding rearward swinging of the inner ends of these gangs exerts pressure upon' the outer ends of gangs 48 and 4| to cause them to swing rearwardly. The gangs may be held in any desired angular position by the operation of the lever 31. The rear section is stabilizedl bythe plate 44, andrearward movement ofthe plate is limited by a stop comprising a vertical projection 52 on the center `bar 2|. In Figure 4 the plate 44 is Shown in contact with the. projection 52, with the rear gangs 4|) and "4| in axial alinement. In this Yposition the rear gangs 4U and4| are at their normal distance from the front gangs I4 and '5 when the tractoris be'-A ing propelled forwardly in transport position. The central. telescoping connection provided by the plate 44 ,and the central rframe .bar |9'with the collapse of links 50 and 5| allowthe front and. rear sections and l2 to be'brought bodily together in close association to better control the har-row when backing. The'.rear section' is frther stabilized bya pair of telescoping b arsy 53 and 54, respectively, pivoted at their outer ends upon the frames 42 and 4'3 and having ltheir inner ends received for sliding movement insleeves`55 and 56 provided on bars 53 and 54, respectively. The operation of the 4tandem disk harrow of the present invention should be clear from the foregoing description. Likewise,.it should be ung"- derstood that the invention has been described in itsnpreferred embodiment, and that modifications rnay be made thereinv without departing from the spirit of theinvention or the scope of the appended claims.

What is claimed is: 1. In a disk harrow, a pair of transverselyextending generally parallel harrow sections in tandem.` relation, va draft structure attached tothe forward section, collapsible draft lconnections lnetween said sections, ya central frame member ex tending longitudinally lbetween said sections, -a connection between saidforward section and said frame member, a connecting element slidable longitudinally of said memberfOr connecting the rear section thereto, whereby said rear section may be telescoped with relation to said forward section, bumpers on the .rear of said forward section..for limiting telescoping movement of Said rear section, and as'top Yon said central frame member engageable withY said slidable connecting elementonly in they transport position of thehar'- row to transmit draft fromthe central. frame member to the rear section. 1

2.,In4 a disk harrowa pair of transversely` extending' generally parallel harrow sections in tandem relation, a draft structure attached to the forward'section, collapsible draft connection'sbetwensaid sections, a central frame member extend-ing'longitudinally between said sections, a connection between said forward section and'said frame member, a connecting element slidable longitudinally of said member for connecting the rear section thereto, whereby said rear section may ce telescoped with relation to said forward section, stop means on said frame member engageable with said slidable connecting element only in the transport position of the harrow to limit the rearward movement of the rear section and transmit draft from the frame member thereto, and laterally spaced rearwardly extending bumpers on said forward section engageable with said rear section for limiting telescoping movement of said rear section in the other direction.

3. In a disk' harrow, a pair of harrow sections in tandem relation, each said section comprising a pair of laterally spaced gangs, draft connections between said sections, said connections serving to transmit draft between said sections in the operating position thereof, a central frame member extending longitudinally of said implement, connections between the central portions of said sections and said frame member at longitudinally spaced points thereon, the connection of one said section to said frame member being slidable to 6 provide for longitudinal movement of said section with respect to the other, and a stop on said frame member engageable with the rear harrow section only in the transport position of the harrow to transmit draft to the rear section.

PAUL R. SONNEMAN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,421,048 Ward June 27, 1922 1,476,512 Heston Dec. 4, 1923 1,489,020 Smith Apr. 1, 1924 1,533,029 Robinson et al. Apr. 7, 1925 1,611,358 Miller Dec. 21, 1928 1,667,392 Robinson Apr. 24, 1928 1,777,512 Altgelt Oct. 7, 1930 1,824,011 Enzenauer et al. Sept. 22, 1931 l 1,836,227 Curry et al. Dec. 15, 1931 2,113,832 Everett Apr. 12, 1938 2,239,948 Young Apr. 29, 1941 2,255,380 Curtis Sept. 9, 1941 

